This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A159146 #4 Feb 16 2025 08:33:10
%S A159146 1,37,895,18258,344232,6263585,112602011,2027853814,36907675875,
%T A159146 682950675146
%N A159146 Number of permutations of 1..n containing the relative rank sequence { 235164 } at any spacing.
%C A159146 Same series for 461532 316245 542613 365142 412635 241563 536214
%H A159146 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159146 A056986 A158005 A158423
%K A159146 nonn
%O A159146 6,2
%A A159146 _R. H. Hardin_ Apr 05 2009